PE = Polyethylene. is a plastic material belonging to a group of polymers called polyolefins. It is usually first categorized by its density as indicated in the abbreviations e.g. HDPE (high density PE), MDPE (medium density PE), LDPE (low density PE) , LLDPE (linear low density PE).

OPP = Oriented polypropylene. This films have a variety of uses in both packaging and non-food packaging applications. These films are complex, usually multi-layered structures, which are developed to meet the exacting requirements of end-users, such as Coca-Cola®, Pepsi-Cola®, Frito-Lay®, Hershey® and Nabisco®.

CPP = cast polypropylene. Has been known in the packaging field to be the more "elegant" brother of polyethylene film, with higher gloss, greater transparency and better heat resistance. In the stationery industry, CPP film has developed the reputation for being the cost effective alternative to PVC film. What is not widely known about CPP film is its versatility. This film category is available in a variety of types and for multiple applications. CPP film is available with a polished or embossed surface, gloss or matte finish, stiff or flexible, clear or colored (semi-transparent or opaque), or in a combination thereof.